PENINGKATAN POTENSI BATU PADAS LADGESTONE SEBAGAI ADSORBEN ION LOGAM BERAT Cr(III) DALAM AIR MELALUI AKTIVASI ASAM DAN BASA

Abstract

The research with aim to increase potency of natural batu padas of Ladgestone type through activation used
by acid (H2SO4) and basa (NaOH) various concentrations (2.0; 4.0; and 6.0N) to adsorption ability of heavy metal
ion of Cr(III) in water have been done. Acid and base activated batu padas was characterizated of specific surface
area with blue methylen method, whereas surface acidity determined by acid-base titration. Whereas, amount of
Cr(III) which can of maximum adsorpted every weight of adsorben or adsorption capacity determined by atomic
absorption spectrophotometer (AAS). The result measurement of activated batu padas compared by batu padas
without activation (control).
Result of research indicate that batu padas after activated by NaOH and of H2SO4 yield surface acidity
(active sites) and realtive higher specific surface area compared with without activation (control). Maximum
ability(capacity) adsorption to Cr(III) was just increasing for NaOH activated batu padas. Highest Capacities
obtained by NaOH activated batu padas at concentration 4.0N was 2.0265 mg/g.